Eli zimerman



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UNITED STATES PATENT OFFICE..

ELI ZIMERMAN, OF WATERTOWN, NEW YORK, ASSIGNOR OF ONE-HALF TO THEHITCHCOCK LAMP COMPANY, OF SAME PLACE.

BENCH-DOG.

SPECIFICATION forming part of Letters Patent No. 591,519, dated October12, 1897.

Application led February 19, 1897. Serial No. 624,223. (No model.)

To a/ZZ whom, it Wwy concern:

Be it known that I, ELI ZIMERMAN, a citizen of the United States,residing at Watertown, in the county of Jei'erson and State of New York,have invented certain new and useful Improvements in Bench-Dogs; and Ido hereby declare the following to be a full,

- the dog.

A further object of the invention is to provide means wherebythe dog maybe sustained in operative position beyond one edge of the work bench ortable,which position of the dog is especially7 desirable when the workor board is of such width that it cannot be heldsteadily by the dog onthe top of the work-bench.

My invention consists in the combination of an adjustable carrierprovided with means for attaching it to a work table or bench in amanner to support the dog directly over and upon the table or at oneside thereof, combined with the dog mounted upon said carrier andadjustable therewith; and the invention further consists in the novelcombination of devices and-in the construction and arrangement of parts,which will be hereinafter fully described and claimed.

To enable others to understand my invention, I have illustrateddifferent embodiments thereof in the accompanying drawings, forming apart of this specification, and in which* Figure 1 is a plan viewshowing the carrier and dog applied to a Work-bench, the full linesillustrating the device resting upon the top of the bench and the dottedlines showing said device projected beyond the side of the bench. Fig. 2isa sectional elevation on the plane indicated by the dotted line 2 2 ofFig. 1. Fig. 3 is a detail perspective View of the adjustable carrier.Figs. 4 and 5 are detail views of the members of the clamping-dog.

Like numerals of reference denote corresponding parts in all the figuresof the drawings, referring to whichl 2 designate the members of theworkholding dog. These members are made of curved or bow-shaped metalpieces and constructed for pivotal attachment to a work bench or.carrier and to carry the grippingjaws for holding the work. The membersl 2 have'eyes or openings 3 formed at intermediate points of theirlength to receive screws, rivets, or other suitable means of attachment,(indicated at 4 5,) which form the pivots of the members and on whichthey are free to turn in introducing or withdrawing the work between themembers. Each member is divided by its pivot or fulcrum into a long armand short arm and the short arm is made larger and stronger than thelong arm to withstand the strain imposed thereon in clamping the work. Iprefer to make the short arm with a dovetailed recess 6, in which isiitted the gripping-jaw 7, of some sui-table material, to frictionallyengage with the work; but the employment of separate jaws is optionalbecause the short arms maybe shaped to make the gripping-jaws integralparts of the members of the dog. The long arms of the jaws are curvedreversely to each other, and they are recessed or cut away on theiropposing faces to permit the long arms to overlap one another. Themembers l 2 are pivoted or fulcrumed in such relation to each other thatthe gripping-jaws face each other and are adapted to spread laterally toprovide for the ready introduction of the work between the same. Thelong reverselyfcurved arms of the 'members are arranged to meet at theirextremities when the gripping-jaws are closed to abut against eachother, but when the jaws are spread or opened the arms overlap more orless in order to present their inner curved edges to the end of the workto be introduced between said jaws. The recess or cut-away portion onone or both curved arms of the members provide a shoulder or shoulders9, again-st which an edge of the other member mayabut'in order to limitthe spread of the members and the outward adjustment of the jaws awayfrom eachother,

as will be readily understood. The dog thus IOO described may beattached directly to the top of a work bench or table, but because ofthe close arrangement of the dog to the table it is not well adapted toholding wide Work steadily in place for the workman to operate thereon.To meet these conditions, I employ an adjustable carrier for the dog, onwhich carrier the dog is mounted to partake of its adjustments, saidcarrier being so arranged that it may sustain the dog in operativeposition at one side or edge of the table.

The carrier is represented at l0 in the drawings in the form of asubstantially oval plate having a throat or opening 11 at one end andprovided with a laterally-extendin g shank 12, which is rigid orintegral with the carrier. This shank 12 serves in connection with aclamp 13 as a means for attaching the carrier to a work-bench forhorizontal adjustment thereon, and in the embodiment shown in thedrawings this shank has a longitudinal slot 1i, through which passes theclamp 13, that maybe loosened when the carrier is to be adj usted orwhich may be tightened to rigidly hold the carrier and dog in position.I prefer to make a channel or recess 15 in the top of the work-bench andto fit the shank 12 therein, so that the carrier may rest directly uponthe work-bench when it is retracted within the edge of the bench, andwhen it is projected to sustain the dog at one side of the bench thecarrier partly rests upon the bench to relieve the clamp 13 somewhatfrom strain, as will be understood by reference t0 Fig. 1. The members 12 of the dog are fulcrumed to the sides of the carrier near the openthroat 11 thereof, and when the jaws are Opened or spread the spacebetween them coincides with the throat 11 to permit the work to beeasily introduced or withdrawn between the jaws and within the carrier.The work is introduced between the jaws and shoved endwise between thesame until its end abuts against the inner edges of the overlappingcurved arms of the members, thus spreading the members and forcing thejaws inwardly until the latter grip or bind against the faces of thework. The gripping action of the jaws on the work depends upon theextent to which the work is shoved into the dog, and the farther in thework is forced the tighter will the jaws grip the work. The dog is thusadapted for action automatically so far as manual manipulation of themembers is concerned, because the members are free and unrestrainedexcept by the fulcra thereof, all adjustingscrews and other devicesbeing dispensed with in the construction of my simple bench-dog. If thewidth of the work is such that it cannot be held steadily by the dogwhen the work rests edgewise upon the table, the carrier and dog may beadjusted to occupy a positionat one side of the table by releasing theclamp, then moving the carrier horizontally the proper distance, andthen fastening the carrier by adjusting the clamp. The work can beeasily introduced into the dog by slipping it endwise through thecarrier-throat and between the dog-jaws until the end of the work abutsagainst the curved arms of the members to force them apart and close thedogs upon the work. The operator may easily release the work by pullingit endwise from between the jaws or by pressing the arms of the membersinwardly to spread the jaws.

I am aware that modifications in the form and proportion of parts and inthe details of construction herein shown and described as the preferredembodiment of my invention may be made by a skilled mechanic withoutdeparting from the spirit or sacrificing the advantages thereof, and Itherefore reserve the right to make such alterations as fairly fallwithin the scope of my invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. An open-throat carrier having means for adjustably attaching the sameto a suitable bench or work-table for the purpose of projecting thecarrier beyond one side or edge of said table, combined with a bench-dogmounted on said carrier to be adjustable therewith and provided withmeans for gripping the work independently of the adjustment of saidcarrier, substantially as and for the purposes described.

The carrier provided with a work-receiving throat or space and withmeans for adj ustably fastening the same to a work table or bench,combined with a beneh-dog having its members pivoted to said carrier onopposite sides of the throat thereof and having gripping-jaws to engagewith work introduced into the dog, substantially as described.

3. The combination with a work bench or table, ofahorizontally-adjustable carrier provided with an open throat attachedto the bench or table for adjustment at one side or edge of the table orbench or for retraction within said edge to rest upon the table orbench, and a bench-dog having its members pivoted to said carrier, asand for the purposes described.

4. The carrier provided with a work-receivf ing throat and with anextended attachingshank, combined with a clamp adapted to engage withsaid shank to hold the carrier firmly in place, and a bench-dog havingits members pivoted to said carrier on opposite sides of the throatthereof, as and for the purposes described.

In testimony whereof I affix my signature in presence of two witnesses.

ELI ZIMERMAN. lVitn esses:

HARRISON K. COLE, C. W. CLARE.

TOO

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